Leakage testing of coalbed methane (coal seam gas) wells in Queensland Australia

Investigation report: Leakage testing of coalbed methane (coal seam gas) wells in the Tara ‘rural residential estates’ vicinity (Queensland, Australia) by Department of Employment, Economic Development and Innovation, June 1, 2010, Queensland Government
The Petroleum and Gas Inspectorate was advised of complaints made by a number of Tara rural residential estate residents. The Commissioner for Mine Safety and Health Mr Stewart Bell authorised an investigation into the allegations of excessive noise and concerns regarding possible toxins and gas leaks from Queensland Gas Company (QGC) coal seam gas well heads. In response to these concerns, the Safety and Health Division of the Department of Employment, Economic Development and Innovation (DEEDI) in conjunction with Simtars (Safety in Mines Test and Research Station) undertook a gas analysis, noise monitoring and well head leakage investigation. … A total of fifty-eight (58) individual gas wells have been inspected and tested to date at the QGC Kenya gas fields of Lauren, Codie and Kate. Of the fifty-eight gas wells tested: One (2%) of the gas wells tested was found to be leaking above the LEL (lower explosive limit) of methane. Four (7%) of the gas wells were leaking at a rate at or above ten percent of the lower explosive limit (LEL) of methane. Twenty one (36%) of the gas wells tested were found to have very minor to minor ppm gas leaks.

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